Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method for transmitting a discovery message by a terminal in a communication system, the method comprising: identifying that a discovery process used for discovery message transmission is unsupportable in a first cell which is a serving cell for the terminal; identifying a second cell other than the first cell; receiving system information from the second cell; identifying that the second cell is configured to support the discovery process based on the system information; identifying whether transmission pool information or reception pool information is included in the system information; in case the system information includes the transmission pool information, transmitting a first discovery message using a transmission resource based on the system information, and in case the system information includes the reception pool information, receiving a second discovery message using a reception resource based on the system information, wherein the second cell satisfies S-criteria and PLMN selection criteria related to cell selection, wherein the transmission pool information indicates at least one transmission resource by which the terminal is allowed to transmit the first discovery message, and wherein the reception pool information indicates at least one reception resource by which the terminal is allowed to receive the second discovery message.
In wireless communication systems, terminals use discovery messages to detect nearby devices for direct communication. However, some cells may not support the necessary discovery process, preventing terminals from transmitting or receiving these messages. This invention addresses the problem by enabling a terminal to identify an alternative cell that supports the discovery process and then use that cell's resources for message transmission or reception. The method involves a terminal detecting that its current serving cell does not support the discovery process. The terminal then identifies a second cell, receives its system information, and checks whether the second cell supports the discovery process. If the system information includes transmission pool information, the terminal transmits a discovery message using the specified transmission resources. If the system information includes reception pool information, the terminal receives a discovery message using the specified reception resources. The second cell must meet cell selection criteria, including signal quality (S-criteria) and public land mobile network (PLMN) selection criteria. The transmission pool information defines available transmission resources, while the reception pool information defines available reception resources. This approach ensures terminals can still perform discovery operations even when their serving cell lacks support.
2. The method of claim 1 , further comprising: initiating a reselection procedure to the second cell in response to identifying that the system information does not include the transmission pool information; transmitting, to the second cell, a request to allocate the transmission resource; and receiving, from the second cell, information about the transmission resource allocated by the second cell to the terminal.
This invention relates to wireless communication systems, specifically methods for managing transmission resources in cellular networks when system information lacks transmission pool details. The problem addressed is the inability of a terminal (e.g., a user device) to efficiently allocate transmission resources when the system information of a target cell does not provide necessary transmission pool information, leading to delays or inefficiencies in communication. The method involves a terminal operating in a first cell and preparing to transition to a second cell. If the terminal detects that the system information of the second cell does not include transmission pool information—required for direct communication with other devices—the terminal initiates a reselection procedure to the second cell. After reselection, the terminal sends a request to the second cell to allocate a transmission resource. The second cell then provides the terminal with information about the allocated transmission resource, enabling the terminal to use it for communication. This approach ensures that the terminal can still obtain necessary transmission resources even when the system information is incomplete, improving communication efficiency and reliability. The method may also involve the terminal monitoring for system information updates or using preconfigured transmission pool information if available.
3. The method of claim 1 , wherein transmitting the discovery message using the transmission resource comprises transmitting the first discovery message using the transmission resource based on the transmission pool information in response to identifying that the system information includes the reception pool information, and that the system information does not include the transmission pool information.
This invention relates to wireless communication systems, specifically methods for transmitting discovery messages in scenarios where system information is incomplete. The problem addressed is the efficient transmission of discovery messages when a device receives system information that includes reception pool information but lacks corresponding transmission pool information. In such cases, the device must determine how to transmit its discovery message without relying on predefined transmission resources. The method involves a device receiving system information from a network, which includes reception pool information but does not include transmission pool information. The device then identifies this discrepancy and, in response, transmits a discovery message using a transmission resource based on the transmission pool information. This ensures that the device can still transmit its discovery message even when the system information is incomplete, maintaining communication reliability. The transmission pool information may be derived from stored data, preconfigured settings, or other available resources. The method ensures that devices can adapt to incomplete system information while maintaining proper discovery message transmission.
4. The method of claim 1 , further comprising: initiating a reselection process to the second cell in response to identifying that the system information does not include the reception pool information, and the transmission pool information; transmitting, to the second cell, a request to allocate the transmission resource; and receiving, from the second cell, information about the transmission resource allocated by the second cell to the terminal.
This invention relates to wireless communication systems, specifically methods for managing resource allocation during cell reselection in a network where system information does not include reception or transmission pool details. The problem addressed is the inefficiency in resource allocation when a terminal (e.g., a user device) moves between cells and must determine available resources without prior knowledge of the transmission and reception pools in the target cell. The method involves a terminal identifying that system information from a second cell lacks reception pool and transmission pool information. In response, the terminal initiates a reselection process to the second cell. After reselection, the terminal transmits a request to the second cell to allocate a transmission resource. The second cell then allocates a transmission resource and sends information about the allocated resource back to the terminal. This ensures the terminal can efficiently acquire necessary resources without relying on pre-existing system information, improving communication reliability and reducing delays in resource allocation. The method may also include steps for the terminal to receive data from the second cell using the allocated resource, further optimizing data transmission in dynamic network environments.
5. A terminal in a communication system comprising: at least one processor configured to: identify that a discovery process used for discovery message transmission is unsupportable in a first cell which is a serving cell for the terminal, identify a second cell other than the first cell, identify that the second cell is configured to support the discovery process based on system information received from the second cell, identify whether transmission pool information or reception pool information is included in the system information; and a transceiver configured to: receive the system information from the second cell, in case the system information includes the transmission pool information, transmit a first discovery message using a transmission resource based on the system information, and in case the system information includes the reception pool information, receive a second discovery message using a reception resource based on the system information, wherein the second cell satisfies S-criteria and PLMN selection criteria related to cell selection, wherein the transmission pool information indicates at least one transmission resource by which the terminal is allowed to transmit the first discovery message, and wherein the reception pool information indicates at least one reception resource by which the terminal is allowed to receive the second discovery message.
In wireless communication systems, terminals (user devices) use discovery processes to detect nearby devices for direct communication, such as device-to-device (D2D) or proximity services. However, not all cells (base station coverage areas) support these discovery processes, leading to potential service disruptions or inefficiencies. This invention addresses the problem by enabling a terminal to dynamically identify and utilize a neighboring cell that supports the required discovery process, even if the current serving cell does not. The terminal includes a processor and a transceiver. The processor detects that the current serving cell does not support the discovery process and identifies a neighboring cell that does. It then checks system information from the neighboring cell to determine if it includes transmission pool information (resources for sending discovery messages) or reception pool information (resources for receiving discovery messages). The transceiver receives this system information. If transmission pool information is present, the terminal transmits a discovery message using the specified resources. If reception pool information is present, the terminal receives discovery messages from other devices using the specified resources. The neighboring cell must meet standard cell selection criteria (S-criteria and PLMN selection criteria) to ensure proper connectivity. The transmission and reception pool information define the allowed resources for sending and receiving discovery messages, respectively. This approach ensures seamless discovery operations even when the serving cell lacks support.
6. The terminal of claim 5 , wherein the at least one processor is further configured to: initiate a reselection procedure to the second cell in response to identifying that the system information does not include the transmission pool information, and wherein the transceiver is further configured to: transmit, to the second cell, a request to allocate the transmission resource, and receive, from the second cell, information about the transmission resource allocated by the second cell to the terminal.
A wireless communication terminal is configured to operate in a network where system information from a serving cell may lack details about a transmission resource pool for device-to-device (D2D) communication. The terminal includes a transceiver and at least one processor. The processor is configured to detect whether the system information from the serving cell includes transmission pool information. If the information is missing, the processor initiates a reselection procedure to switch to a second cell. The transceiver then transmits a request to the second cell to allocate a transmission resource for D2D communication. The second cell responds by providing information about the allocated transmission resource, which the terminal uses for subsequent D2D operations. This approach ensures the terminal can still access necessary transmission resources even if the initial serving cell does not provide the required system information, improving reliability in D2D communication scenarios. The solution addresses the problem of incomplete system information in wireless networks, particularly in environments where D2D communication is supported but not uniformly configured across all cells.
7. The terminal of claim 5 , wherein the transceiver is configured to transmit the first discovery message using the transmission resource based on the transmission pool information in response to identifying that the system information includes the reception pool information, and that the system information does not include the transmission pool information.
This invention relates to wireless communication systems, specifically to a terminal device configured to transmit and receive discovery messages in a network. The problem addressed is efficient resource allocation for device-to-device (D2D) communication, where terminals need to discover each other without relying solely on network-provided resources. The terminal includes a transceiver and a controller. The transceiver is configured to receive system information from a base station, which may include reception pool information defining resources for receiving discovery messages from other terminals. The controller determines whether the system information also includes transmission pool information, which defines resources for transmitting discovery messages. If the system information contains reception pool information but lacks transmission pool information, the transceiver transmits a first discovery message using the transmission resource based on the transmission pool information. This ensures that the terminal can still transmit discovery messages even when the network does not explicitly allocate transmission resources, improving D2D communication reliability. The terminal may also receive a second discovery message from another terminal using the reception pool information, enabling bidirectional communication. The invention optimizes resource usage by dynamically adapting to the available system information, reducing dependency on network-provided transmission resources while maintaining compatibility with existing D2D communication protocols.
8. The terminal of claim 5 , wherein the at least one processor is further configured to: initiate a reselection process to the second cell in response to identifying that the system information does not include the reception pool information, and the transmission pool information, and wherein the transceiver is further configured to: transmit, to the second cell, a request to allocate the transmission resource, and receive, from the second cell, information about the transmission resource allocated by the second cell to the terminal.
A wireless communication terminal operates in a cellular network where system information from a serving cell may lack details about resource pools for device-to-device (D2D) communication. The terminal includes a transceiver and at least one processor. The processor identifies whether the system information from the serving cell includes reception and transmission pool information for D2D communication. If this information is missing, the terminal initiates a cell reselection process to switch to a second cell. After reselection, the terminal transmits a request to the second cell to allocate a transmission resource for D2D communication. The second cell responds by providing information about the allocated transmission resource, which the terminal then uses for D2D communication. This approach ensures the terminal can access necessary D2D communication resources even when the initial serving cell does not provide the required system information. The solution improves reliability in D2D communication by dynamically handling missing resource pool information through cell reselection and direct resource allocation requests.
9. A method for transmitting a discovery message in a terminal in a communication system, comprising: identifying that a discovery process used for discovery message transmission is unsupportable in a serving cell; identifying a cell other than the serving cell; receiving, from the cell, system information including transmission pool information of the cell; and transmitting the discovery message based on the transmission pool information included in the system information received from the cell, wherein the cell satisfies S-criteria and PLMN selection criteria related to cell selection, and wherein the transmission pool information indicates at least one transmission resource by which the terminal is allowed to transmit the discovery message.
This invention relates to wireless communication systems, specifically addressing the challenge of transmitting discovery messages when a terminal cannot use the discovery process in its current serving cell. The method involves detecting that the discovery process is unsupported in the serving cell and identifying an alternative cell that meets specific criteria, including S-criteria for cell selection and PLMN (Public Land Mobile Network) selection criteria. The terminal then receives system information from this alternative cell, which includes transmission pool information defining available resources for discovery message transmission. The terminal uses these resources to transmit the discovery message. The transmission pool information specifies at least one transmission resource that the terminal is permitted to use. This approach ensures that discovery messages can still be transmitted even when the serving cell does not support the required discovery process, improving reliability in device-to-device (D2D) or proximity-based services. The solution leverages existing system information to dynamically adapt to network conditions, avoiding the need for additional signaling or configuration.
10. The method of claim 9 , wherein transmitting the discovery message based on the transmission pool information comprises: transmitting the discovery message by the at least one transmission resource.
In wireless communication systems, devices often need to discover each other for direct communication, such as in device-to-device (D2D) or machine-to-machine (M2M) networks. A key challenge is efficiently managing discovery message transmissions to avoid collisions and ensure reliable communication. Existing solutions may not optimize resource allocation for discovery messages, leading to inefficiencies or interference. This invention addresses the problem by improving the transmission of discovery messages in a wireless network. The method involves selecting at least one transmission resource from a pool of available resources, where the pool is defined by transmission pool information. The transmission pool information specifies the resources (e.g., time slots, frequency channels, or code sequences) that can be used for sending discovery messages. The method then transmits the discovery message using the selected transmission resource(s). This approach ensures that discovery messages are sent in a controlled manner, reducing collisions and improving communication reliability. The transmission pool information may be predefined or dynamically adjusted based on network conditions, further optimizing resource usage. By carefully selecting and utilizing the transmission resources, the method enhances the efficiency and effectiveness of device discovery in wireless networks.
11. A terminal in a communication system, comprising: at least one processor configured to: identify that a discovery process used for discovery message transmission is unsupportable in a serving cell, and identify a cell other than the serving cell; a receiver configured to receive, from the cell, system information including transmission pool information; and a transmitter configured to transmit the discovery message based on the transmission pool information included in the system information received from the cell, wherein the cell satisfies S-criteria and PLMN selection criteria related to cell selection, and wherein the transmission pool information indicates at least one transmission resource by which the terminal is allowed to transmit the discovery message.
This invention relates to wireless communication systems, specifically addressing the challenge of device-to-device (D2D) discovery in scenarios where the serving cell does not support the required discovery process. The solution involves a terminal that detects when the serving cell cannot support the discovery process and identifies an alternative cell that meets both signal quality (S-criteria) and network selection (PLMN) criteria. The terminal then receives system information from this alternative cell, which includes transmission pool information specifying available resources for discovery message transmission. The terminal uses these resources to transmit its discovery message. The transmission pool information defines at least one transmission resource, such as time-frequency slots, that the terminal is permitted to use. This approach ensures reliable D2D discovery even when the serving cell lacks support, leveraging neighboring cells that meet operational criteria. The system information may be broadcast or provided via dedicated signaling, and the terminal may prioritize cells based on signal strength, network affiliation, or other selection factors. This method enhances D2D communication robustness in heterogeneous network environments.
12. The terminal of claim 11 , wherein the transmitter is configured to transmit the discovery message by the at least one transmission resource.
This invention relates to wireless communication systems, specifically improving device discovery in networks where devices need to efficiently locate and connect with each other. The problem addressed is the need for a reliable and energy-efficient method for devices to announce their presence and capabilities to nearby devices, particularly in scenarios with limited bandwidth or power constraints. The invention describes a terminal device equipped with a transmitter that sends a discovery message to facilitate communication with other devices. The discovery message includes information about the terminal's capabilities, such as supported communication protocols, available services, or other relevant data. The transmitter is configured to send this message using at least one transmission resource, which may include specific time slots, frequency channels, or other allocated communication resources. This ensures that the discovery message is transmitted in a structured and predictable manner, reducing collisions and improving detection by other devices. The terminal may also include a receiver to detect discovery messages from other devices, allowing for bidirectional communication. The system may further include a controller to manage the transmission and reception of these messages, optimizing resource usage and ensuring timely updates. The invention aims to enhance the efficiency and reliability of device discovery in wireless networks, particularly in environments where devices operate with limited power or bandwidth.
Unknown
November 3, 2020
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